Effect of Some Growth Regulators and Water Stress on Seed Yield Of Soybean (Glycine max L. Merrill) At Eastern Sudan

Badr ELdin Abdelgadir Mohamad Ahmed, Ahmed Babker Ahmed

Abstract


Afield experiment was conducted for summer seasons during 2017and 2018 on the Demonstration Farm of the Faculty of Agriculture, University of Kassala at Halfa Elgadidh. To investigate the effects of watering intervals, plant growth regulators on yield and yield components of soybean. The watering regimes treatments were irrigation every 10 and 20 days, and eight plant growth regulators levels (for gibberellins hormone GA3) were designated as GA0, GA50 ,GA75 and GA100 corresponding to 0,50, 75 and 100 ppm, respectively. Also, NAA levels were designated as NAA0, NAA20, NAA25 and NAA30 corresponding to 0, 20, 25 and 30 ppm, respectively. The experiment was arranged as split plot trail in RCBD with three replications. Characters studied were number of seeds and yield per plant and per unit area, straw yield in addition to harvest index. The results showed that prolonged watering interval significantly reduced yield attributes. It reduced grain yield by more than 26.0%, while spraying soybean with GA100and NAA25significantly increased reduced yield by more than 17.0% and 60.0% in both seasons as compared to GA75 and control (GA0NAA0). The significant increase in yield due to plant growth regulators under frequent irrigation was associated with significant increase in most of the yield components (number of branches, number of seeds and pods plant-1, and 100-seed weight

Keywords


Water Stress, Growth regulators, seed yield, HI, Soybean

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